I wonder if you could help me in my hunt for
"O qual meco, o Nice", a cantata not from Alessandro, but from Domenico Scarlatti.
The original is presumably in the Vienna State Library, although I didn't find it there.
Could it maybe somewhere else?

R.M.23.b.27.(1-12.). ROYAL MUSIC COLLECTION. Scarlatti (Domenico).
Cantatas; 18th century. 12 cantatas: nos. 1 and 2 for two voices,
nos. 3-12 for solo voice, in score, with a figured bass for harpsichord,
and nos. 4 and 11 with 2 violins and figured bass. In the same hand throughout.

1. 16 ff. Se per un sol momento, a duo [sic].

2. 12 ff. Tirsi caro, a duo.

3. 6 ff. Se ti dicesse un core.

4. 19 ff. Pur nel sonno almen tal’ora.

5. 5 ff. Sospendi o man per poco.

6. 6 ff. No, non fuggire o Nice.

7. 7 ff. Qual pensier.

8. 6 ff. Fille gia piu non parlo.

9. 6 ff. Ti ricorda o bella Irene.

10. 6 ff. Con qual cor.

11. 20 ff. O qual meco Nice cangiata.

12. 6 ff. Di Fille vendicarmi vorrei.

Do you know if the Nr. 11 is the same nr. als the "O qual meco, O Nice" from above?
Hm, I should probably order it as well...

Following events recently in the "Musical Puns, Jokes, and Teasers"
thread, I was cornered into scanning this cantata by Weber.
He wrote 6 in total, but this is the only non-orchestral one, scored
somewhat strangely for piano, flute, 2 sopranos, tenor, bass, and choir.
It was written in 1821, and the vocal score of it, which omits the flute,
was published by Novello in England under the title 'Three Seasons'.
It is observed that the music of the final chorus was later used by
Weber in his opera Euryanthe.

Weber Cantata 'Du, bekränzend uns're Laren' (VS) J283.pdf

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